the efficiency of of the body to take in oxygen and eliminate carbon dioxide
Answer:
as recently as 100 years ago, doctors might have been able to diagnose an illness, but they were often unable to cure it.
Answer:
Carbohydrates are mainly starch. Starch is a big molecule & cannot pass into the bloodstream so is broken down into glucose. Glucose is a sugar.
Some carbohydrates probably do contain glucose anyway.